Ink cartridge



FIG. 1 is a front, top and right side perspective view of an ink cartridge showing our new design;

FIG. 2 is a rear, bottom, and left side perspective view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a rear view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Broken lines illustrate portions of the ink cartridge and form no part of the claimed design. 

CLAIM The ornamental design for an ink cartridge, as shown and described. 